Single-service tool-holder.



S. S. FULLER. SINGLE SERVICE TOOL HOLDER. APPLICATION FILED 00123, 1912.

Patented Sept. 16, 1913.

Macaw nnrrnn STATES rarnn'r canton.

SILAS S. FULLER, 0F AUBURN, MAINE.

SINGLE-SERVICE TOOL-HOLDER.

Specification of Letters Patent.

Patented Sept. 16, 1913.

Application filed. October 23, 1912. Serial No. 727,303.

To all whom it may concern:

Be it known that I, bILAs S. FULLER, a citizen of the United States, residing at Auburn, county of Androscoggin, State of Maine, have invented certain'new and useful Improvements in Single-Service Tool- Holders, of which the following is a specification.

This invention relates to tool holders and particularly to a single service tool holder so called, that is, a holder intended for only one position of tool presentation. In holders of this sort great strength and rigidity are required in simple and convenient and inexpensive structure. Great difiiculty has been experienced in bringing out such a holder which would pass the severe tests of trade requirement.

One of the principles of which application has been heretofore attempted, is the selfwedging, that is to say, it has been attempted to employ wedging structures so that the strain on the cutter would increase the grip of the holder on the tool. This principle, while correct in theory, is capable of erroneous application, and it is the object of my present invention to provide a structure in which the benefits of wedging are secured without the difficulties and faults usually present in such structures.

In my invention I provide a wedging angle adapted to secure adjustment for oversize and undersize tool stock by means of a limited movement, alsol have provided for a very firm 1n1t1al wedging and for a great simplicity of structure capable of great economy in manufacture. All these various features will be more fully described in the soecification which follows.

In the drawings which form a part thereof I have shown a preferred form which, as a commercial type, affords an excellent practical illustrative embodiment.

Throughout specification and drawing like reference numerals are employed to indicate corresponding parts and in the drawings, Figure 1 is a side view of my tool holder. Fig. 2 is a top view of the same. Fig. 8 is a section in the line 33 of Fig. 1. Fig. 4 is a similar section, but with the setting handle reversed and Fig. 5 is a view of a modified form of the shank head.

My tool comprises a shank 1, having a head 2. The head 2 has an up or bearlng surface 2 substantially paralle with the line of thrust on the tool and a lower face 3 set at an angle thereto so as to converge in the direction of the shank. The surface 3 is formed as a groove, being surrounded by walls 3, and it is within this groove and between these lateral walls 3 that the tool 4 is laid.

Surrounding the head 2 is a sliding block formed preferably of two plates 5 5 riveted together at 6 and meeting a shoulder 7 at the inner end of its play on the head and a stop 8 at the outer end of said head. The upper and lower bearing faces of the opening through the block 5 are parallel with the corresponding external faces 2 and 3 of the head 2. The surface 2 therefore presents a straight bearing for the block while the inner face of the lower side of the block and the corresponding face 3 of the head lie in parallel planes which approach as the block 5 is pushed back on the head 2 toward the shoulder 7. The included angle of the face 3 is such that in the slight play afforded between the stop 8 and the shoulder 7 an adjustment is provided ample to take care of over and under sizes of tool stock. This, however, leaves a corresponding tendency in the wedged parts to work loose in starting and I therefore have provided for a means of setting up the wedged elements. The block 5 is provided on each side with an opening 9, formed with double cam bearing walls and in the head 2 is a small circular hole 9 bored transversely therethrough.

My setting up device is a removable key or wrench 10, having a cam shaped lower end 10 and a center pin 11 adapted to fit in the hole 9. The head 10 is shaped to coact with the cam sides of the openings 9 in either direction and on either side. By means of this construction I am able to set a tool 4 clamping it initially and firmly for presentation to the work, after which the working strain will only tend to tighten the wedging action of the block.

Although the maximum wedging effect is secured by the positioning 'of the cutter blade t below the head it may be, for some classes of work, positioned on top of the head. In this case the head is formed as shown in Fig. 5. In this figure I have shown the head 2 with a groove having lateral walls 3 within which the tool may be lodged as in the case of the walls 3 shown in Figs. 1, 3, 1. With this head the block 5 is used in the same manner as with the head 2 and the parts are wedged by the same sliding action of the lever 10.

Various other modifications in the structure and assembling of my device may obviously be made, all without departing fro-m the spirit of my invention if within the limits of the appended claims.

hat I therefore claim and desire to secure by Letters Patent is 1. A tool holder comprising a fixed shank, a head on said shank and having a converging upper and lower bearing surface, a block having a longitudinal opening receiving said head and slidably mounted thereon, said block having converging upper and lower. walls, the lower wall of the block opening and the lower bearing face of the head constituting a tool clamp.

2. A tool holder comprising a shank, a head on said shank and having converging upper and lower bearing surfaces, a. block having a longitudinal opening, having converging upper and lower walls, the lower wall of said block opening, and said head having a transverse hole therethrough and said block having an opening on each side to receive the pivot stud and cam end respectively of a setting up tool substantially as shown and described.

3. A tool holder comprising a shank, a head on said shank and having converging upper and lower bearing surfaces, a block having a longitudinal opening, having converging upper and lower walls, the lower wall of said block'o 'iening, and said head having a transverse hole therethrough and said block having an opening on each side and a setting up tool comprising a handle having a cam shapedend and a pivot stud laterally projecting therefrom adjacent to said end.

4. In a tool holder of the class described a head having a pair of opposite converg in'g faces, a block slidably mounted on said head and having corresponding faces and a pair of stops spaced apart on said head to limit the sliding motion of said block.

'5. In a tool holder of the class described, a pair of longitudinal, slidably mounted members having a pair of opposite clamping Copies of this patent may be obtained for faces, a wedge element for causing said clamping faces to approach upon said sliding of said members and means for initially wedging said members.

6. A tool holder comprising a fixed shank, a head on said shank and having rearwardly diverging upper and lower bearing surfaces, a block having a longitudinal opening re ceiving said head and slidably mounted thereon, said block having rearwardly di-V verging upper and lower walls, the lower wall of said block opening and the lower bearing surface of said head. constituting a tool clamp.

7. In a tool holder of the class described, a head having a bearing surface thereon, a clamping member slidably mounted on said head and having a cot iperating bearing surface, said clamping member having an open mg therein, a settmg up tool having a cam.

end adapted to enter said opening, and means for engaging said setting up tool and said head in rotative but not longitt'idinally movable relation.

8. In a tool holder of the class described a head having a bearing surface, a member slidably mounted relative to said head and having a bearing surface adapted to co-act with the bearing surface of said slide to frictionally clamp a tool t-herebetween, said slidable member having an opening therein, as'ettmgaip device operatively connect-mg w1th said head and having an end for cam mmgly engaging said opening of the slidable member.

9. In a tool holder of the class described a head, a member slidable relative'thereto and coacting with said head to frictionally clamp a' tool therebetween,said member hav inga cam opening on each side thereof, and

a settingaip device opera-tively connecting five cents each, by addressing the Commissioner of Patents, Washington, G. 

